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Table 2 General characteristics of selected articles

From: Global research mapping of substance use disorder and treatment 1971–2017: implications for priority setting

   Tobacco Drug addiction Alcohol
Characteristic Category Number Percent Number Percent Number Percent
Total number of papers   4469 100 5403 100 2137 100
Year of publication 2013–2017 1688 37.8 2090 38.7 850 39.8
2008–2012 1302 29.1 1565 29.0 536 25.1
2003–2007 803 18.0 855 15.8 364 17.0
1998–2002 364 8.1 489 9.1 234 10.9
1993–1997 198 4.4 278 5.1 126 5.9
1988–1992 82 1.8 70 1.3 24 1.1
<  1988 32 0.7 57 1.0 3 0.1
Number of authors 1 286 6.4 418 7.8 166 7.8
2–3 1300 29.1 1691 31.3 730 34.2
4–6 1772 39.7 2197 40.7 866 40.5
7–10 903 20.2 905 16.7 309 14.5
> 10 208 4.7 192 3.6 66 3.1
Number of subject category 1 2261 50.6 2492 46.1 970 45.4
2 1709 38.2 2331 43.1 934 43.7
3 470 10.5 557 10.3 220 10.3
4 22 0.5 14 0.3 9 0.4
5 4 0.1 8 0.1 3 0.1
Country of first author (top 10) (number of papers) 1 USA 2464 USA 3329 USA 1444
2 England 321 Australia 208 Australia 80
3 Canada 179 England 200 England 76
4 Australia 167 Canada 195 Canada 63
5 Netherlands 99 Italy 115 Netherlands 40
6 Spain 90 Germany 82 Sweden 33
7 China 64 Spain 80 Italy 27
8 Italy 60 France 77 Germany 26
9 Germany 57 Netherlands 70 Iran 20
10 Switzerland 57 Switzerland 61 Switzerland 18